[Chicken-janitors] #891: args egg: can't use an option called "name"

[Chicken Trac]

#891: args egg: can't use an option called "name"
------------------------+---------------------------------------------------
 Reporter:  dreamtime   |       Owner:       
     Type:  defect      |      Status:  new  
 Priority:  major       |   Milestone:  4.8.0
Component:  extensions  |     Version:  4.7.x
 Keywords:              |  
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 When using the args egg, trying to use an option called "name" fails
 because of a conflict with the args egg's own internal "name" variable.

 From the args egg documentation:  "BODY is an option-processor as defined
 in SRFI 37, and has access to the variables OPT (the current #<option>),
 NAME (the option name) and ARG (argument value or #f)."

 At line 12 in the code example given below, everything works as intended,
 with the "name" variable being set to "foo" when the program is called as:
 ./myprogram.csi --name=foo

 But after line 19, the "name" variable is empty again.

 If the "name" variable is changed from "name" to anything else, like
 "xyz", it works.

 {{{
 01  (define name "")
 02
 03  ...
 04
 05  (define opts
 06    (list (args:make-option
 07    ...
 08      (args:make-option
 09        (n name)
 10        (required: "NAME")
 11        "description of this option goes here"
 12        (set! name arg))
 13    ...)
 14
 15  (define (get-args)
 16    (receive (options operands)
 17             (args:parse (command-line-arguments)
 18                         opts
 19                         #:unrecognized-proc unrecognized-option)
 20             (check-args options operands)
 21             (values name foo bar baz)))
 }}}

-- 
Ticket URL: <http://bugs.call-cc.org/ticket/891>
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